If the "air car" surprised Wang Huan and others because of its strange body shape and the behavior of the plane loading the plane, then Qiao Shiming's words just now really shocked these people.

There is no way, it is really because compared to the sensory stimulation of the "air car", the repair of the low-pressure turbine blades of the JT9D turbofan engine can be regarded as really touching the soul of the Shanghai Airlines.

You must know that the repair of aero engine turbine blades is not only in China, but also in foreign countries, which is also a high-end category, and it is not something that can be done by just pulling a company or factory.

After all, turbine blades are one of the most critical core heating components of aero engines, which need to withstand high temperatures of thousands of degrees Celsius and unimaginable high-speed centrifugal force.

Especially for high-thrust turbofan engines such as JT9D turbofan engines, the production process of turbine blades is quite complicated, not to mention anything else, just the air film cooling holes and internal cavities used for heat dissipation are extremely exquisite works of art, but it is said that it is more than a snake to add to the snake, less than a point of performance is not enough, to achieve an unprecedented extreme.

It is such a kind of human industrial crystallization comparable to a work of art, and it is really difficult to repair it as a dojo in a screw shell.

Because of this, in addition to the United States and a few European companies controlled by the United States, only the United States and a few European companies controlled by the United States can do this kind of turbine blade repair in the world, and a maverick country like France can do it, but the overall quality is not as good as the United States, and countries like Japan simply do not have the corresponding ability, so they dare not touch it, and can only be handed over to the United States to deal with.

As a result, Qiao Shiming said that the low-pressure turbine blades of the JT9D turbofan engine that were shipped three days ago had been repaired?

Although the main reason for the failure of the JT9D turbofan engine this time is not the big problem of turbine blade breakage or fracture, but the increase in the fitting gap between the blade crown of the front section of the low-pressure turbine blade and the sealing ring of the outer honeycomb assembly due to long-term use, triggering the aero engine alarm.

Strictly speaking, it is not as difficult to maintain as the low-pressure turbine blades themselves, but compared to the complexity of the low-pressure turbine blades themselves, in fact, the overall difficulty is still higher than that of other components.

First of all, the material, because it needs to withstand a certain high temperature and high pressure, so the crown of the low-pressure turbine blade is made of a nickel-based alloy with high temperature resistance.

The second is heat treatment, because of the unique properties of the high-temperature resistant nickel-based alloy itself, it needs to be very meticulous in heat treatment, and there are extremely strict requirements in quenching, tempering, and what cooling medium is used, and the temperature is controlled within 1 degree Celsius, otherwise the whole part may be scrapped due to the internal metallographic structure abnormality.

Machining again, needless to say, aviation machining is only precise, precision is more precise, either with high-precision machine tools, or there must be a highly skilled eighth-level worker, otherwise it is difficult to achieve that ultimate precision.

Finally, it is combined with the blade, so the precision welding process can not be avoided, although there are many subdivided methods, but no matter what the method, the top is the forefront of the welding field.

To sum up, it is only a general direction, there are many details in it, each of which is high-end on the high-end, otherwise the aero engine will not be called the crown jewel of the industry, and it is the extreme.

However, it is this kind of extreme that Tengfei Aviation Maintenance Plant has actually done it?

Three days, from the JT9D turbofan engine to the factory has only been three days, 72 hours, the strained crown of the low-pressure turbine blade has been repaired?

Not to mention Wang Huan, an insider, even Qi Hong, who is half-hearted, thinks that his ears are wrong, you must know that the failure of their airline's Boeing 767 is sudden, and it is impossible for the Tengfei Aviation Repair Plant to know in advance, let alone prepare materials and plans in advance, it is completely temporary, how can the Unprepared Tengfei Aviation Repair Factory be repaired so quickly?

If nothing else, how to solve the material?

Normally, it takes more than three days for synthetic materials to be cast as a whole, not to mention the subsequent heat treatment and machining.

You must know that in the past, when outsourcing maintenance companies in the United States or Europe helped Shanghai Airlines to repair similar strained blades of low-pressure turbine blades, the minimum cycle was about one and a half months, and the result was that the Tengfei Aviation Maintenance Plant only took three days, how could it be!

Seeing that Wang Huan and the others didn't believe it, Qiao Shiming didn't explain too much, but pointed to the small factory on the other side: "Go there and have a look first." ”

After saying that, lift your legs and leave.

made Wang Huan and the others stunned for a moment, and said in their hearts, can you answer the question first, and make a hammer in the east and a stick in the west, it will make people crazy.

Fortunately, Zheng Yongning explained at this time: "Wang Gong, Manager Qi, let's go over and take a look, it is a new process that our factory has just applied, and it is thanks to this new process that the strained blade crown of the low-pressure turbine blade of the JT9D turbofan engine can be repaired in three days." ”

In this way, Wang Huan and others understood what was going on, even if they were interested, they could do a good job of high-end restoration work in three days, what kind of process is it?

With three points of suspicion, three points of curiosity, three points of expectation and one point of caution, Wang Huan and the others followed Qiao Shiming and soon came to the very inconspicuous small factory, as soon as they entered, everyone had a strange feeling, because the whole interior was not so much a factory, but a laboratory, all kinds of instruments, all kinds of display devices and shiny computing and processors, plus those staff in white coats who shuttled back and forth, so that Wang Huan and others thought that they had gone to the wrong place.

Just about to ask Zheng Yongning next to him if this was a production workshop, Qiao Shiming suddenly spoke: "Well, it's just in time, they just started processing the crown of the new low-pressure turbine blade." ”

As he spoke, he pointed to the center of the plant, and everyone immediately took advantage of the situation and saw that there was a large equipment more than two meters high and more than three meters wide standing in the center of the plant through the back glass.

However, although the equipment is large, most of it is a support mechanism or auxiliary structure, and the real core is the translucent workbench in the center, which is no more than the size of an 18-inch TV.

Inside, something resembling a machining probe moves nimbly back and forth.

"It's ...... Multi-axis machining center?"

Because of the distance, and the workbench on the equipment is too small, and the eyes are not very good, Wang Huan can't see what is going on inside at all, but from the overall structure, it is very in line with the setting of the multi-axis machining center in Wang Huan's heart.

Zheng Yongning on the side smiled: "This is much more magical than a multi-axis machining center, Wang Gong, look here, there is real-time monitoring on the screen." ”

Being reminded like this, Wang Huan noticed that the screen on the console next to him happened to be the picture in the equipment workbench, and hurriedly held his glasses to look at it.

In the black and white picture, the flexible probe rotated in a strange circle, and then a device was blocked, and then the probe continued in a strange circle.

After only looking at it twice, Wang Huanbian frowned, what is this, it's not a multi-axis machining center, what is it?

Just as Wang Huan was about to open his mouth to say a few words, Qi Hong suddenly touched him with his hand, and then pointed to the screen with a ghostly look and said, "Wang Gong, look, the metal parts are growing layer by layer." ”

Wang Huan looked carefully again when he heard this, and his face was also as alive as Qi Hong, and the metal parts in the workbench were really growing on their own.